<template>
  <div>
    <!-- 弹出层的头部区域 -->
    <van-nav-bar title="频道管理">
      <template #right>
        <van-icon
          name="cross"
          size="0.37333334rem"
          color="white"
          @click="closeEv"
        />
      </template>
    </van-nav-bar>
    <!-- 我的频道 -->
    <div class="my-channel-box">
      <div class="channel-title">
        <span
          >我的频道
          <span class="small-title">
            点击{{ showEv ? "删除" : "进入" }}频道
          </span>
        </span>
        <span @click="editEv">{{ showEv ? "完成" : "编辑" }}</span>
      </div>
      <!-- 我的频道列表 -->
      <van-row type="flex">
        <van-col
          span="6"
          v-for="obj in userList"
          :key="obj.id"
          @click="deleteChannelFn(obj)"
        >
          <div class="channel-item van-hairline--surround">
            {{ obj.name }}
            <!-- 删除的徽标 -->
            <van-badge
              v-show="showEv && obj.id !== 0"
              color="transparent"
              class="cross-badge"
            >
              <template #content>
                <van-icon
                  name="cross"
                  class="badge-icon"
                  color="#cfcfcf"
                  size="0.32rem"
                />
              </template>
            </van-badge>
          </div>
        </van-col>
      </van-row>
    </div>

    <!-- 更多频道 -->
    <div class="more-channel-box">
      <div class="channel-title">
        <span>点击添加更多频道：</span>
      </div>
      <!-- 更多频道列表 -->
      <van-row type="flex">
        <van-col
          span="6"
          v-for="obj in allChannelList"
          :key="obj.id"
          @click="moreFn(obj)"
        >
          <div class="channel-item van-hairline--surround">{{ obj.name }}</div>
        </van-col>
      </van-row>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    userList: Array, // 用户已选
    allChannelList: Array, // 用户未选
  },
  data() {
    return {
      showEv: false, // 叉号的显示与否
    };
  },
  methods: {
    //控制编辑，上面的小叉
    editEv() {
      this.showEv = !this.showEv;
    },
    //添加频道的功能
    moreFn(obj) {
      if (this.showEv) {
        // porps 是只读的违背了单向原则
        // this.userList.push(obj);
        this.$emit("addChannelEv", obj);
        // console.dir("@@@"+channelObj);
      }
    },
    //删除频道
    deleteChannelFn(obj) {
      if (this.showEv) {
        if (obj.id !== 0) {
          this.$emit("deleteEv", obj);
        } 
      }else {
          //进入当前点击的频道
          //先关闭弹出层
          this.$emit("closeEv");
          //通过 v-model 的双向绑定，input事件，将参数传递给v-model绑定的vue变量
          this.$emit("input", obj.id);
        }
    },
    closeEv() {
      this.$emit("closeEv");
      //让内部的编辑状态回归false
      // this.showEv = false
    },
  },
};
</script>

<style scoped lang="less">
.van-popup,
.popup-container {
  background-color: transparent;
  height: 100%;
  width: 100%;
}

.popup-container {
  display: flex;
  flex-direction: column;
}

.pop-header {
  height: 90px;
  background-color: #007bff;
  color: white;
  text-align: center;
  font-size: 14px;
  position: relative;
  .title {
    width: 100%;
    position: absolute;
    bottom: 15px;
  }
}

.pop-body {
  flex: 1;
  overflow: scroll;
  padding: 8px;
  background-color: white;
}

.my-channel-box,
.more-channel-box {
  .channel-title {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    line-height: 28px;
    padding: 0 6px;
  }
}

.channel-item {
  font-size: 12px;
  text-align: center;
  line-height: 36px;
  background-color: #fafafa;
  margin: 5px;
}

/*删除的微标 */
.cross-badge {
  position: absolute;
  right: -3px;
  top: 0;
  border: none;
}

/*提示文字 */
.small-title {
  font-size: 10px;
  color: gray;
}
</style>